US3561475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual hydraulic brake systems and brake booster mechanisms therefor
Assignee: Individual
•
Filing: 1968-09-19
•
Granted: 1971-02-09
•
Expires: 1988-09-19
Abstract
Abstract A bleeder valve assembly for a dual hydraulic brake system having dual hydraulic lines with independent fluid reservoirs. The bleeder valve assembly includes a hydraulic chamber communicating with both of the hydraulic lines, and containing a primary valve element for controlling the bleeding of hydraulic fluid from the dual lines via the chamber. A pair of secondary valve elements are mounted within the chamber, each cooperating with one of the dual hydraulic lines. A rubber grommet biases both of the secondary valve elements against the fluid pressure in the dual hydraulic lines, and a bleeder screw is associated with the grommet to control the bleeding of fluid from the lines into the chamber.
Inventors
- 👤 Edward A Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/18; B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; B60T11/20; B60T11/203; B60T11/28; B60T11/30; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K15/046; F16D55/00; F16D2055/0075; F16D2055/0091; F16D2121/00; F16D2121/02; F16D2123/00; F16D2250/00; F16K2200/00; F16K2200/20; F16K2200/203; Y; Y10; Y10S; Y10S137/00; Y10S137/903; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7845; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
An improved bleeder valve for a dual hydraulic brake system having dual hydraulic lines with independent fluid reservoirs, said bleeder valve comprising the combination of means defining a fluid chamber communicating with both of the hydraulic lines, a primary valve element associated with said fluid chamber for controlling the bleeding of fluid from the dual hydraulic lines via said chamber, a pair of secondary valve elements mounted within said chamber each of which cooperates with one of said dual hydraulic lines, and a resilient biasing element common to each of said secondary valve elements for biasing same against the fluid pressure in said dual hydraulic lines.
Claim 2
Dependent Claim
106 words
An improved bleeder valve for a dual hydraulic brake system having dual hydraulic lines with independent fluid reservoirs, said bleeder valve comprising the combination of means defining a fluid chamber communicating with both of the hydraulic lines, a primary valve element associated with said fluid chamber for controlling the bleeding of fluid from the dual hydraulic lines via said chamber, a pair of secondary valve elements mounted within said chamber each of which cooperates with one of said dual hydraulic lines, and a resilient biasing element common to each of said secondary valve elements for biasing same against the fluid pressure in said dual hydraulic lines.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |